winrt::check_pointer function template (C++/WinRT)
A helper function that checks whether a pointer is null and, if so, calls the winrt::throw_last_error function to retrieve the calling thread's last-error code value, and throw an exception using a C++/WinRT object that represents that error code. Also see winrt::hresult_error.
Syntax
template<typename T>
T* check_pointer(T* pointer);
Template parameters
typename T
The type of the pointer to check.
Parameters
pointer
A pointer value to check for null. An exception is thrown only if pointer is null.
Return value
A valid pointer; a value is returned only if an exception is not thrown, therefore the pointer is valid.
Requirements
Minimum supported SDK: Windows SDK version 10.0.17134.0 (Windows 10, version 1803)
Namespace: winrt
Header: %WindowsSdkDir%Include<WindowsTargetPlatformVersion>\cppwinrt\winrt\base.h (included by default)